Other Speed Detection Systems - Whistler GT-138Xi User Manual

SPEED MONITORING TECHNOLOGIES
• The receiving range of your laser detector will not be the same
as a radar detector. Laser guns are most often used at short
range.
Whistler Laser/Radar detectors receive all current laser guns
which operate at a laser wavelength of 800-1000nm.

Other Speed Detection Systems

Several techniques other than radar or laser are used to measure
vehicle speeds. When these methods are being used, no
detector can provide a warning.
These techniques include:
• Pacing - A patrol car drives behind you and matches your
driving speed.
• Vascar/Aircraft - The time it takes a vehicle to travel a known
distance is measured.
The Interceptor VG-2, or simply VG-2, is a microwave receiver
used by police to detect signals radiated by the local oscillator
of a radar detector. Because its purpose is to identify persons
driving with radar detectors, the VG-2 is known as a "radar
detector detector" (RDD). An RDD is the primary tool used
by the police to identify radar detector equipped vehicles. If
caught, in a country where detectors are illegal, drivers risk losing
their radar detector and receiving a fine. In addition, instant-on
radar is almost always used in combination with a RDD, leaving
unsuspecting motorists vulnerable to receiving two tickets; one
potentially for speeding, the other for possession of a detector.
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